I love this lens. It amazes me every time I use it. I can't believe they will ever improve it. It is as sharp as s***. Fast focusing. Worth the money and worth the weight. I don't really need any other lens just maybe a tele sometimes.
This lens is probably my favourite lens at the moment alongside the 85mm f1.4L IS. It is beautifully sharp and renders wonderfully. I have used it at weddings and events, and it is fantastic for up close candids. I barely use my 24-70mm f2.8L II and use this instead.